CN105863077B - A kind of U-shaped bilateral plate node of support plug-in type beam column support - Google Patents

Abstract

The invention discloses a U-shaped double-sided plate joint supported by a beam-column support, which includes a multi-cavity steel pipe concrete composite column, and a double-wall steel pipe concrete composite column horizontally fixed on one side of the multi-cavity steel pipe concrete composite column through two side plates and a lower cover plate. The side plate H-shaped steel composite beam, along the top and bottom of the double-side plate H-shaped steel composite beam, inserts the support square tube with the preset reinforcement plate at an inclined angle, and the support square tube of the preset reinforcement plate is combined with the double-side plate H-shaped steel Beams and multi-cavity steel pipe concrete composite columns constitute the U-shaped double-sided plate joints supported by inserted beams and columns. As the edge constraining member of the entire steel tube concrete column, this node can improve its bearing capacity, energy dissipation capacity and ductility; it is convenient for construction and saves materials and labor. The overall structure meets the design principle of "strong columns and weak beams, strong nodes and weak components". The nodes have multiple seismic fortification lines to avoid the damage of the overall system due to the damage of some components, and also have the necessary strength, good deformation capacity and energy consumption. ability.

Description

A support insertion type beam-column support U-shaped double-side plate joint

technical field

The invention relates to a U-shaped double side slab joint supported by a supporting inserted beam column, which is mainly applied to the steel pipe concrete composite column of multi-storey and high-rise buildings in the building structure.

Background technique

With the economic globalization and the improvement of urbanization level, the urban population density is gradually increasing, which makes a large number of high-rise buildings emerge continuously. There is an urgent need for new technologies to support the design and construction of high-rise and multi-storey buildings.

Concrete filled steel tube utilizes the interaction between the steel tube and concrete in the process of stress, that is, the restraint of the steel tube on the concrete makes the concrete in a complex stress state, so that the strength of the concrete is improved, and the plasticity and toughness are greatly improved. At the same time, after the steel pipe is filled with concrete, the buckling of the steel pipe wall can be avoided or delayed due to the supporting effect of the concrete. The combination of the two materials makes up for their respective shortcomings, making the material performance fully exerted.

With the development of society and the improvement of living standards, people have higher and higher requirements for the usable area and aesthetics of houses. The traditional round or square cross-section concrete-filled steel tube columns are usually not completely surrounded by walls, and a large part of the column feet protrudes from the interior of the room, occupying a certain amount of indoor space, which limits the furniture and room layout to a certain extent. The steel pipe concrete composite column with rectangular cross-section can be as wide as the wall, which solves the problem of protruding edges and corners of the column.

Studies have shown that for the general form of rectangular concrete-filled steel tube composite columns, the constraints of steel tubes on the core concrete are limited to the corner points, weaker at the periphery, and the bearing capacity is relatively low. The multi-cavity concrete-filled steel tube composite column whose end column is a rectangular steel tube is equipped with restraint members at the edge to improve its bearing capacity and energy dissipation capacity. Stiffening and tie measures are arranged laterally to divide the column body into several chambers, so that the restraint effect of the steel plate on the concrete Reinforce, reduce the aspect ratio of the steel plate at the same time, prevent or delay the local buckling of the steel plate.

Contents of the invention

The purpose of the present invention is to provide a support insertion type beam-column support U-shaped double-side plate joint with stiffened rib concrete-filled steel composite columns with simple construction and low cost, which solves the problem of protruding edges and corners in the traditional column chamber and improves the performance of multi-cavity concrete-filled steel tubes. Bearing capacity and ductility of composite columns. Delay or avoid the reduction of component stiffness, bearing capacity and ductility due to local buckling of the steel pipe wall plate, and give full play to the performance of the material. The overall structure satisfies the design principle of "strong columns and weak beams, strong nodes and weak components". The nodes have multiple seismic fortification lines, and have the necessary strength, good deformation capacity and energy dissipation capacity.

In order to achieve the above object, the present invention adopts the following technical solutions:

A supporting insert type beam-column support U-shaped double-sided slab joint, including a multi-cavity steel pipe concrete composite column, and a double-side slab H-shaped steel horizontally fixed on one side of the multi-cavity steel pipe concrete composite column through two side plates and a lower cover plate Composite beam, a supporting square tube with a preset reinforcing plate is inserted at an inclined angle along the top and bottom of the double-side plate H-shaped steel composite beam, and the supporting square tube of the preset reinforcing plate is connected with the double-side plate H-shaped steel composite beam, multi-cavity The steel tube concrete composite column constitutes the U-shaped double-sided plate joint supported by the inserted beam and column.

Further, the H-shaped steel composite support beam of the double-side plate includes H-shaped steel, and two stiffeners arranged between the steel flanges at the end of the H-shaped steel, and a pair of H-shaped steel webs are connected along both sides of the inner side of the stiffened rib. The connecting piece with the edge of the section steel is flush, and the upper cover plate is welded on the outside of the upper and lower flanges of the H-section steel.

Further, the connecting piece is an angle steel structure, and bolt holes are distributed on the outer end surface of the angle steel.

Further, the width of the upper cover plate is greater than the width of the upper and lower flanges of the H-shaped steel.

Further, the stiffeners are fixed on both sides of the web of the H-shaped steel.

Further, the side plate is a rectangular plate with a hypotenuse, and the hypotenuse is provided above the two extension sections clamped on the multi-cavity concrete-filled steel tube composite column 1 .

Further, the side plate is provided with through holes corresponding to the bolt holes of the connectors.

Further, the supporting square tube of the preset reinforcing plate includes a supporting square tube, left and right reinforcing side plates and cover plates on the upper and lower sides of the end of the supporting square tube, and the left and right reinforcing plates are cut off at right angles to the upper side The rectangular plate, cut off part of the hypotenuse and fit one side of the supporting square tube, and set it horizontally relative to the bottom edge of the opposite corner with the right angle part cut off, and clamp the supporting square tube at an inclination angle of 45°.

Further, the width of the left and right reinforcing side plates is greater than the thickness of the supporting square tube; the upper and lower cover plates are slightly larger than the width of the supporting square tube.

The support insertion type beam-column support U-shaped double-side plate node of the present invention can be applied in the support frame system of the multi-cavity steel pipe concrete composite column support frame system assembled by support insertion.

The present invention can obtain following beneficial effect:

1) The double-sided H-shaped steel composite beam and the plug-in composite support are the same width as the multi-cavity steel pipe concrete composite column, which avoids protruding edges and corners of the indoor column, and can increase the usable area and aesthetics of the room.

2) The H-shaped steel composite beam with double side plates and the reinforced side plates on both sides of the supporting square tube and the reinforced cover plate are preset on the top, and the reinforced plate and the side plate are welded as the edge restraint member of the entire steel tube concrete column, which can improve Its carrying capacity and energy dissipation capacity.

3) The cover plate is welded horizontally between the double side plates, and then the multi-cavity steel pipe concrete composite column is inserted between the lower cover plate and the double side plates as a whole, and the H-shaped steel composite beam of the double side plate is inserted up and down between the double side plates. The supporting square tube with reinforced plate improves the bearing capacity and ductility of the component. The structure is convenient for on-site construction, does not damage the multi-cavity steel pipe concrete composite column, and saves materials and labor.

4) Due to the use of multi-cavity steel pipe concrete composite columns, the steel pipes have a strong restraint effect on the concrete, and the overall bearing capacity and ductility of the column body are relatively good, which meets the design requirements of strong columns and weak beams.

5) The overall structure satisfies the design principle of "strong columns and weak beams, strong nodes and weak components". The nodes have multiple anti-seismic fortification lines to avoid the damage of the overall system due to the damage of some components, and also have the necessary strength and good deformation capacity and energy consumption capacity.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the U-shaped double-sided plate node supported by the inserted beam and column of the present invention;

Figure 2 (a)-(c) is a schematic diagram of the structure of the double-sided plate H-shaped steel composite beam;

Figure 3 (a)-(c) is a schematic diagram of the structure of the multi-cavity concrete filled steel pipe composite column with side plates;

Figure 4 (a)-(c) is a schematic diagram of the supporting square tube structure of the preset reinforcement plate;

Figure 5(a)-(d) is a schematic diagram of the joint structure of the H-shaped steel composite support of the double side plate and the supporting square tube inserted into the preset reinforcement plate and the multi-cavity steel pipe concrete composite column;

Fig. 6 is a schematic diagram of the support frame system of the multi-cavity concrete filled steel pipe composite column applied to the support insertion assembly of the present invention;

Fig. 7 is (a)-(c) is the schematic diagram of beam yield failure process;

Fig. 8 is a schematic diagram of the hysteresis curve of a node.

In the figure: 1. Multi-cavity steel pipe concrete composite column; 2. Side plate; 3. H-shaped steel composite beam with double side plate; 3-1, H-shaped steel; 3-2, upper cover plate; 3-3, stiffener; 3 -4. Lower cover plate; 3-5. Connecting piece; 4. Supporting square tube of upper preset reinforcing plate; 4-1. Supporting square tube; 4-2. Upper reinforcing cover plate; 4-3. Lower reinforcing cover 4-4, the left reinforced side plate; 4-5, the right reinforced side plate; 5, the supporting square tube of the lower preset reinforced plate.

Detailed ways

The present invention will be described in further detail below in conjunction with specific embodiments.

As shown in Fig. 1, the U-shaped double-sided plate joint supported by the inserted beam column of the present invention includes a multi-cavity steel pipe concrete composite column 1, and is horizontally fixed on the multi-cavity steel pipe by two side plates 2 and a lower cover plate 3-4 The double-sided plate H-shaped steel composite beam 3 on one side of the concrete composite column 1 is inserted into the supporting square tube 4 with the upper preset reinforcing plate and the lower preset The supporting square tube 5 of the reinforcing plate, the supporting square tube 4 of the upper preset reinforcing plate and the supporting square tube 5 of the lower preset reinforcing plate, the H-shaped steel composite beam 3 of the double side plate, and the multi-cavity steel pipe concrete composite column 1 form a supporting plug-in type Beams and columns support U-shaped double-sided plate joints.

As shown in Figure 2 (a)-(c), the H-shaped steel composite support beam 3 with double side plates of the present invention includes H-shaped steel 3-1, and two steel flanges arranged between the ends of the H-shaped steel 3-1 A stiffening rib 3-3, the stiffening rib 3-3 is welded on both sides of the web of the H-shaped steel 3-1, and a pair of H-shaped steel 3-1 is welded along both sides of the web of the H-shaped steel 3-1 inside the stiffening rib 3-3. 1. The connectors 3-5 with flush edges are respectively welded with upper cover plates 3-2 on the outer sides of the upper and lower flanges of the H-shaped steel 3-1. Wherein, the connecting piece 3-5 is an angle steel structure, and bolt holes are distributed on the outer end surface of the angle steel.

As shown in Figure 3 (a)-(c), side plates 2 are fixed on both sides of the multi-cavity steel pipe concrete composite column of the present invention, and side plates 2 are provided with through holes corresponding to the bolt holes of the connecting parts 3-5, It is convenient to be fixedly connected with the H-shaped steel composite supporting beam 3 of the double side plate. The lower cover plate 3-4 is horizontally fixed between the two side plates 2, and the two side plates 2 are rectangular plates with hypotenuses, and the hypotenuses are set above the two extended sections clamped on the multi-cavity steel pipe concrete composite column 1 .

As shown in Figure 4 (a)-(c), the supporting square tube 4 of the preset reinforcement plate includes a supporting square tube 4-1, and left reinforcing side plates 4 arranged on the left and right sides of the end of the supporting square tube 4-1 -4 and the right reinforced side plate 4-5, and the upper reinforced cover plate 4-2 and the lower strong cover plate 4-3 located on the upper and lower sides of the end of the supporting square tube 4-1; wherein, the left reinforced side plate 4- 4 and the right reinforced side plate 4-5 are rectangular plates with right angles cut off on one side of the upper part, the cut off part of the hypotenuse fits with one side of the supporting square tube 4-1, and the bottom edge of the opposite corner of the cut off right angle part is set horizontally , clamp the supporting square tube 4-1 at an inclination angle of 45°. The width of the left reinforced side plate 4-4 and the right reinforced side plate 4-5 is greater than the width of the supporting square tube 4-1, and the width of the upper reinforced cover plate 4-2 and the lower strong cover plate 4-3 is slightly larger than the supported square tube 4 -1 width.

As shown in Figure 5(a)-(d), the installation process of the U-shaped double-side plate node of the support insertion type beam-column support of the present invention is as follows:

1) Position the side plate 2 on both sides of the multi-cavity concrete-filled steel tube composite column 1 first, and then weld the side plate and the multi-cavity steel tube together by using three-sided fillet welds;

2) Position the lower cover plate between the two side plates, then weld the lower cover plate 3-4 horizontally between the two side plates by means of fillet welds, insert the pre-assembled double side plate H-shaped steel composite beam 3 Between the side plates on both sides, the reinforced H-shaped steel composite beam 3 and the side plates are temporarily fixed by tightening the mounting bolts, and the lower flange of the beam is connected with the part of the side plate protruding from the lower cover plate with a fillet weld, and then the side plate 2 Welding with the upper cover plate 3-2 and connecting pieces;

3) Insert the prefabricated supporting square tubes of the preset reinforced side plates along the upper and lower ends of the two side plates respectively, so as to meet the cut-off part of the hypotenuse of the left and right reinforced side plates 4-2 of the supported square tubes of the preset reinforced side plates Completely fit the hypotenuses of the side plates, and then connect the left and right reinforced side plates 4-2 of the supporting square tubes of the preset reinforced side plates inserted up and down with the side plates on both sides by penetration welding to complete the supporting inserted beam Column supports the installation of U-shaped double-sided plate nodes.

As shown in FIG. 6 , the area indicated by the circle is a schematic diagram of the support frame system of the multi-cavity steel pipe concrete composite column applied in the support insertion assembly of the present invention. Upslopes, downslopes, and horizontal beams supporting the frame system.

The supporting plug-in type beam-column supporting U-shaped double-side plate joint of the invention can improve its bearing capacity and energy dissipation capacity. Since the upper reinforced cover plate 4-2 and the lower reinforced cover plate 4-3, the left reinforced side plate 4-4 and the right reinforced side plate 4-5 are provided on the supporting square tube 4-1 in advance, the preset reinforcement The supporting square pipe of the slab is inserted up and down into the side of the multi-cavity concrete-filled steel pipe composite column in an oblique insertion manner, and the oblique beam (the supporting square pipe of the pre-set strengthening plate) is inserted on site. This method is convenient for construction and does not damage the multi-cavity concrete-filled steel pipe composite column. , saving materials and labor.

The mechanical properties of the U-shaped double-sided plate joint supported by the inserted beam and column of the present invention will be described below by taking the multi-cavity steel pipe concrete composite column-steel beam U-shaped rigid joint joint as a column.

Using ABAQUS software to conduct finite element analysis on the joints, the joint column is a 200x600 multi-cavity concrete-filled steel pipe composite column, the beam is made of H350x150x6x10 welded I-beam, and the thickness of both side plates and cover plates at the joint is the same as that of the beam flange. The results of finite element analysis are shown in Fig. 7(a)-(c).

Due to the use of multi-cavity steel pipe concrete composite columns, the steel pipes have a strong restraint effect on the concrete, and the overall bearing capacity and ductility of the column body are relatively good, which meets the design requirements of strong columns and weak beams. The failure sequence of multi-cavity CFST composite column-steel beam U-shaped rigid joints is shown in Fig. 7(a)-(c). When the external force is large, plastic hinges first appear at the beam end A away from the joint connection area, as shown in Fig. 7(a), the internal force is redistributed, and the bearing capacity of the structure increases; Figure 7(b) shows plastic hinges in the plate; the final failure of the structure is shown in Figure 7(c), the beam end flange buckles, and the upper and lower sides C of the side plate yield in a large area, but the side plate does not form a plastic hinge, and the structure still has certain The energy dissipation capacity meets the design requirements of strong nodes and weak members.

The present invention is based on the principle of seismic concept design. The structure should have multiple seismic fortification lines to avoid the damage of the whole system due to the damage of some components. At the same time, it also requires the structure to have necessary strength, good deformation capacity and energy dissipation capacity. The U-shaped double-side slab joint of the supporting inserting beam-column support of the present invention adopts the multi-cavity steel pipe concrete composite column-steel beam U-shaped rigid joint joint form, adopts the isolation method of the column and the beam end, and is composed of full-height side slabs and cover slabs Nodal connectors to transmit bending moments and shear forces at the beam ends. When an earthquake occurs, plastic hinges first appear at the end of the beam, which consumes a certain amount of seismic energy to form the first seismic fortification line, and then plastic hinges appear on the cover plate to further dissipate the seismic energy to form the second seismic fortification line, and the side panels finally form Plastic hinges form the third seismic fortification line. The overall structure meets the design principle of "strong columns and weak beams, strong nodes and weak components", and the energy dissipation performance of the structure is relatively good. As shown in Figure 8, the hysteresis curve of the node is full without obvious pinching phenomenon. The energy dissipation capacity of the node is good and the deformation is large. When the earthquake comes, the residents have more time to escape.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments. It cannot be determined that the specific embodiments of the present invention are limited thereto. Under the circumstances, some simple inferences or substitutions can also be made, which should all be deemed to belong to the scope of patent protection determined by the submitted claims of the present invention.

Claims (5)

1. A support plug-in type beam-column support U-shaped double side slab joint, characterized in that: it comprises a multi-cavity steel pipe concrete composite column, and is horizontally fixed on one side of the multi-cavity steel pipe concrete composite column by two side plates and a lower cover plate The double-side plate H-shaped steel composite beam, along the top and bottom of the double-side plate H-shaped steel composite beam, inserts the support square tube with the preset reinforcement plate at an inclined angle, and the support square tube of the preset reinforcement plate is connected with the double-side plate H Steel composite beams and multi-cavity concrete-filled steel tube composite columns constitute U-shaped double-side plate joints supported by inserted beams and columns; The H-shaped steel composite beam with double side plates includes H-shaped steel and two stiffeners arranged between the steel flanges at the ends of the H-shaped steel. A flush connector, with an upper cover plate welded on the outside of the upper and lower flanges of the H-shaped steel, the width of the upper cover plate is greater than the width of the upper and lower flanges of the H-shaped steel; the connector is an angle steel structure, and the outer end surface of the angle steel is distributed with A bolt hole; the side plate is provided with a through hole corresponding to the bolt hole of the connector; The U-shaped double side slab joint with support inserting beam and column support is applied in the support frame system of multi-cavity concrete-filled steel pipe composite column support inserting assembly, and is used to support the upper inclined beam, lower inclined beam and horizontal beam support of the frame system. 2. A supporting insert type beam-column supporting U-shaped double-sided plate joint according to claim 1, characterized in that: the stiffeners are fixed on both sides of the web of the H-shaped steel. 3. A support-inserted beam-column support U-shaped double-sided slab node according to claim 1, characterized in that: the side slab is a rectangular slab with a hypotenuse, and two pieces clamp multi-cavity steel pipe concrete composite The rectangular slab of the column extends out of the edge of the multi-cavity concrete-filled steel tube composite column, and the hypotenuse is set above the extension. 4. A support insertion type beam-column support U-shaped double-sided plate node according to claim 1, characterized in that: the support square tube of the preset reinforcement plate includes a support square tube, and is arranged at the end of the support square tube The reinforced side panels on the left and right sides of the upper part and the reinforced cover panels on the upper and lower sides. The left and right reinforced side panels are rectangular plates with a right angle cut off on the upper side. Part of the cut hypotenuse fits with one side of the supporting square tube, and the right angle is cut off relatively. The bottom edge of the opposite corner of the part is set horizontally, and the supporting square tube is clamped at an inclination angle of 30º-60º. 5. A supporting plug-in type beam-column supporting U-shaped double-sided plate joint according to claim 4, characterized in that: the width of the left and right reinforced side plates is greater than the thickness of the supporting square tube; the reinforcements on the upper and lower sides The cover plate is slightly larger than the width of the supporting square tube.